Machine for developing or generating mitered ends of cylinders



F. c. FANTZ' 1,730,009

OF CYLINDERS Oct. 28, 1930.

MACHINE FOR DEVELOPING OR GENERATING MIIERED ENDS Filed April 5, 1929 2 Sheets-Sheet 1 u m n H mm m n t. mu. m A m s N w. M I o l M 2 ll 1 w Q Y fk 2 B Q H L mu //N/// V w- I A Q h W... u (K r Mg .HHHHMWWL r 2 m in... o v S h. E a 97 M G 2 HI .H #0

Oct. 28, 1930. F. c:.- FANTZ 80,00

MACHINE FOR DEVELOPING OR GENERATING MITERED ENDS OF CYLINDERS Filed April 5, 1929 2 Sheets-Sheet 2 m o H 2 a 9 =3 e N 1 1 2 |l 5 I}: Q INVENTOR N FRED C. FANTZ BY 9 @WfiQa-g LI- ATTORNEYS Patented Oct. 28, 1930 UNITED STATES PATENT OFFICE FRED ermv'rz, or WEBSTER enovas, inssomu, ASSIGNOR 'ro mmwnsr PIPING a SUPPLY 00. me, or ST. LOUIS, MISSOURI, A conromrron or mrssoURI MACHINE FOB DEVELOPING R GEN ERATING MI'I'ERED ENDS OF CYLINDERS Original application filed December 2, 1927, Serial No. 237,149. Divided and this application filed April 0 l 5, 1929. Serial No. 352,779.

This application is a division of m -copending application, Serial N 0. 237,149, filed ecember 2, 1927, now Patent 1,745,156 of Jan. 28, 1930.

The object of this invention is, to out any size or shape of any intersection of one cylinder with another without the development of any other fixed means, such as cams, templates, etc., or any separate set-up; and to cut such intersection, up tothe-diameter of and the one being cut, at any tangent, at any angularity, 'on a bevel, straight if needed, or with .mitered ends.

' A further object is, to save time in the welding operation, by providing for the correct rate and uniform travel of the cutting desired angularity or bevel of the wall of the header or nozzle may be obtained.

Another object is, to provide means for uniform rapid travel of the cuttingtorch, thereby effecting a'very substantial saving in the gas required for this operation, as well as in the time necessar to make the out.

A further object is, to provide a machine which will cut the end pipe, as well as the opening in the header.

'nother object is, to provide means for adjusting the cuttingtorch, so that its flame will cut the metal in any preferred or desired s ape. It is a recognized fact, in the industry to which this invention appertains, that considerable timeis required to cut the ends of the pipes or nozzles, and to cut the openings therefor in the header or pipe which is to be intersected. Numerous machines have been invented, such as those employing a cam ation, so as to generate the desired curve; but machines of this character, from their very nature, necessarily require a large numer of cams or templates, which are quite ex pensive to make; and while, if a plant were engaged in turning out a single size of pipe intersecting pipe, such a machine might be practical, it is regarded as thoroughly impractical by the industry, because of the fact line with his torch and of either a nozzle or a that the sizes vary constantly and continually, which requires so many various sizes of templates or cams, and results in such an increase in cost, as to make the use of the machine, for practical purposes, prohibitive.

The result is, that in most shops itis customary to have a man lay out the curve on the drafting board, then transfer it, by a center punched line, to the article to be cut, so the operator can follow the center punched generate the desired curve for the intersection.

With the-use of my invention, however, it becomes possible to generate or develop the intersection of an cylinder 'with another, regardless of the re ative size of the two pipes, limited, of course, to the point where the intersecting pipe equals in diameter the one being intersected, as, obviously, if the intersecting pipe were to pipe being intersected, it would be impossible to join them together.

My means of accomplishing the foregoing objects may be more readily understood by having reference to the accompanying draw-' ings, which are hereunto annexed and made a part of this specification, in which Fig. 1 is a side elevation of my improved device, showing the U-shaped member in both positions, i. e. for cutting the nozzles or pipes, and for cutting the header;

- Fig. 2 is a top or plan view of the same; Fig. 3 shows the header H with the pipe or nozzle 25 intersecting at an angle; H4 and the tangential intersecting pipe or nozzle 23, this fi re showin the outline for the cam referre to in describing the manner usually employed for laying out pipe intersections;

Fig.5 is a diagrammatic view of a pipe to be cut on a miter;

ig. 6 is a side elevation. of the construction employed where a pipe is'to be cut on a miter; and

Fig. 7 is a top or plan view of the same.

imilar reference numerals refer tosimilar parts throughout the entire description. order to accomplish the objects-of my invention,- I provide a cylinder or drum 1,

exceed in diameter the referred to as p 15 of a U-shaped member,

Obviously,asthe U-shaped preferably mounted upon a track 2 so that it can be moved longitudinally into any desired 'sition Suitable means 3 are provided or rotating this drum 1 about its axis. On the ends of the drum 1, are rigidlysecure parallel slides, or guides, 4 and 5, upon whic are mounted adjustable "carriages and 7 which carry bearin ably mounted a ortorch, arm 10, the forward end of wh' ch carries a cutting torch '11, mar medium, or other means of partin materi In usingthe term forward end in referenceto the drhm 1, it should always be understood that I refer to the end adjacent the work, 7

A chucking device 12, sreferably self-centering, is grovided to hol 13, the en of which is to be cut to intersect a header. The carriages 6 and 7 are set out from the-axis of the drum 1, the same distance as the length of radius of the pipe or nozzle 13 which is to b radius C. rotlited on its axis, it is obvious that the torch 11 will be carried around the pipe or. nozzle 18, and a perfectly straight out will be made;

is, however, necessary to generate a suitable curve for the pipe intersection, and I accomplish this by providing a universal joint 14 at the rear end of'the'rod or torch arm 10, which is carried'by thecross-piece the parallel arms which are adjustably mounted 19, which are pivoted in .21 extending upwardly from a suitable base 22.

8 and'9,in w

e cut.

member is osciln the pivots 18 and 19, its cross-piece V swin through an arcv correzonding to t e distance of the cross-piece 15 cm the,- pivots 18 and 19 stituting the radius B: of the arc of the circle latedu I which would be described if it were continued throughout a complete "circle. Inasmuch as the rear end of the rod or torchfarm 10 is secure to the cross-piece 15 by the universal joint 14, the oscillatlon of thecross-piece upon the pivots 18. and 19 causes a reciproca- I motlon to be imparted to the rod torch arm 10, and the length'of this recipthe ordinate A of the arc E-F, from its chord G struck across from the two extremes of oscillation, E andF, of the U-shaped member. If we take the radius B as being the radius of the header H which is to be intersected, and set the U-sha member so that the radius of the arc F which is described, in being oscillated from one extreme to. the other, equals the radius B, it is apparent that a curve will be generated corresponding to the periphery of the header'H which is to be intersected; then if the carria 6 and? on the drum-.1 are set out from its axis a distance equalling the radius G of the nozzle or the drum 1 will, during hich is slid the-pipe or nozzle hlS radius is If the drum 1 is this distance conoccurs, by increasin that the torch 11 carried by pi e ldwhichis w lbe apparent the exact curve'requlred for the nozzle or '13 which is to intersect the header B. will be seen that when the drum 1 is rotated, a ressure will-be exerted upon the universal oint 14, and thereby transmitted to the cross-piece 15 of the U-shaped member, serving to depress it and move it through the arc E-F of the circle a forward motion to the rod or torch arm 10, until it reaches the plane P'of the axis of the drum 1, when it will impart a rearward motion to the said rod or torch arm until it reaches the'extreme E of oscillation of the cross-piece of the U-shaped member, which will be when the rod or torch arm 10 has been revolved through 180 degrees. As the drum 1 continues to rotate, it will exert a lifting movement upon the cross-piece 15 of the U-shaped member, and during degrees of this rotation the rod or torch arm 10 will be given a forward motion, piece 15 of the U-shaped member reachesthe plane P of the axis of the drum 1, when an until the crossits rotation, generate having the radius B, and this movement will operate to impart cut with the curve generated in exact acv cordance w1th' that required for the pipe intersection.

It will be perfectly apparent that any size of pipe canbe handled in this manner, merely by changing the radius 13 and the radius C, the only lim1t being the diameter of the drum 1. It may be found desirable in practice, instead of having one very large drum, to'have two drums of difierent sizes, one for pipes up to 20 inches, and one for larfier pipes, up to the lar est diameter employe It will obvious, from the foregoin description, that the construction as out -'n will generate curves for pi intersections of any size, controlled whol as hereinbefore pointed out, by the diameter of the drum; but it will be equally apparent that when the intersecting pipes are of, ual diameter,then with theradius B equa radius C,"the U-shaped member will be in such a position that the drum cannot rotate, it being at a int which may deadcenter. It is obvious, in view of this fact, that the radius B must always be great er than the radius C, if the machine is to be operative. When this dead center position radius I B sufliciently to throw the U-shape member 05 dead center and then generating the curve, it will be found upon measurement inch, and since thousandths of an inch are never measured in pipe work, it follows that tothe don' that the difierence .in the curve Wlll be in thousandths of an from a practical standpoint this is no objection to the use of the device for the generation of curves for intersecting pipes of equal diameter.

If a nozzle 23 is to be fitted tangentially to header H all the change necessary to be made in the apparatus will be to elevate'the standards and 21, as at 30, so that the pivotal points 31 of the U-shaped member will be offset a distance corresponding to the distance the intersection is off center.

When the intersection is at an angle to the header'H n0t a right angle-I provide for generating the correct curve by mounting I the standards 20 and 21 on a rotatable. base 22, and I mark or scribe a plurality of de grees 32 on the periphery of the'base 22, to

, ,exactly' the sameway,

of the base 22,

indicate the angularity to which it is turned. It follows that by turning the base 22 to the angle required for the intersection, the curve corresponding thereto Will be generated on the pipe or nozzle 25.

It will also be apparent that by rotating the base 22 to a required angle, where the intersection of header H by the nozzle 25 is at an angle, the correct curve will be generated in header H and that by elevating the standards 20 and 21 the required distance, the correct curve will be generated for the tangential intersection of header H by-the nozzle 23.

The radius B for the header is securedin precisely the same manner as that heretofore described, and theradius C is also secured in and obviously the length of the ordinate A will be the same in each case.

When it is desired to cut a miter M on the end of pipe 26, which is to be connected by a similar miter to another pipe (not shown), I employ a slightly different arrangement at the rear of the machine. Instead of the two standards 20 and 21, a single standard 33 is fixedly mounted upon the rotatable base 22. In the top of this standard 33, an axle 34 is rotatably mounted, the of which is located in line with the center X at a point coincident with the axis of the drum 1. This'axle 34 carries a rod 36, which is the same size as the cross-piece 15 of the U-shaped member, and therefore is adapted to have'secured to it, as the desired radius of the pipe 26, the universal joint 14 carried by the rear end of the rod or torch arm 10.,

Obviously, if the drum 1 is rotated when the axle 34 is in line with the axle of the drum 1 (shown in Fig. 6), it will carry with it this rod 36, and no reciprocating motion will be imparted to the torch arm 10; whereas, if the base 22 is rotated (as shown in Fig. 7) so that the axle 34 stands at an angle to the axis of the drum 1, the rod or torch arm10, being attached to rod 36 by the universal joint 14, will then be reciprocated in a plane front end 35 d (instead of in an arc, as where the cross-piece 15 of the U-shaped member guided the torch 11), and the cut will be made at the angle 0 at which the axle 34 intersects the axis of the drum 1. Since this angle 0 can be made of any desired degree, it follows that a miter M of any degree can be cut for pipes which are to be connected in this manner.

For the purpose of full disclosure of my invention I have described in some detail a specific embodiment thereof,- but it will be apparent that numerous changes might be made in the physical embodiment of my in vention within the scope of the claims, and do not desire, therefore, to be understood as limiting myself, in the broader aspect of my invention, to the specific construction shown and described.

Having described my invention, what I regard as new, and desire to secure by Letters Patent of the United States, is:

1. A machine for developing or generating mitered ends of cylinders, comprising a cutting device, a rotatable drum to which said device is slidably secured, means to cause said drum and cutting device to describe a circle about a pipe, and means to vary the angle of the circle described by said cutting device with relation to the axis of the pipe to be cut.

2. A machine for developing or generating mitered ends of cylinders, comprising a drum, a longitudinally slidable rod carried by said drum, means to adjust the position of said rod with relation'to the axis of said drum, a pipe-cutting mechanism carried by one end of said rod, a universal joint on the other end of said rod, a base adjacent one end of said drum, said base being axially rotatable, a standard secured to axle in said standard, and a rod secured to said axle, said universal joint being slidably secured to said rod.

3. A machine for developing or" generating mitered ends of cylinders, comprising a rum, a longitudinally slidable rod carried by said drum, means to adjust the position of said rod with relation to the axis of said drum, a pipe-cutting mechanism carried by one end of said rod, a universal joint on the other end of said rod, a rotatable base adjacent one end of-said drum, a standard fixedly mounted on said base, an axle rotatably mounted in the top of said standard, the center of which is coincident with the axis of, said drum, and a rod secured to said axle drum, an oxyacetylene torch carried by one said base, an

end ofsaid rod, a universal joint on the other end of said rod, means to adjust the position of said torch with relation to the "axis of said drum, a rotatable base adg'acent one end of said drum, a standard xedly mounted on said base, an axle rotatably mounted in the top of said standard, the center of w 'ch 's coincident with the axis of said drum, and a rod secured to said axle and to said universal joint, the center of said rod being coincident with the center of said base.-

FRED C. FANTZ. 

